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   Vazquez_Fernandez, Jorge; Lee, Jae; Serrano_Vacca, Santiago; Magana, Alejandra; Peša, Radim; Benes, Bedrich; Popescu, Voicu (January 2025, SCITEPRESS - Science and Technology Publications)
2. Diaryliodonium Salts Facilitate Metal-Free Mechanoredox Free Radical Polymerizations

   https://doi.org/10.1039/D2SC00313A  

   Zeitler, Sarah Margaret; Chakma, Progyateg; Golder, Matthew (March 2022, Chemical Science)

   Mechanically-induced redox processes offer a promising alternative to more conventional thermal and photochemical synthetic methods. For macromolecule synthesis, current methods utilize sensitive transition metal additives and suffer from background reactivity. Alternative methodology will offer exquisite control over these stimuli-induced mechanoredox reactions to couple force with redox-driven chemical transformations. Herein, we present the iodonium-initiated free-radical polymerization of (meth)acrylate monomers under ultrasonic irradiation and ball-milling conditions. We explore the kinetic and structural consequences of these complementary mechanical inputs to access high molecular weight polymers. This methodology will undoubtedly find broad utility across stimuli-controlled polymerization reactions and adaptive material design. 

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3. Free–free experiments: the search for dressed atom effects

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   Martin, N L; Weaver, C M; Kim, B N; deHarak, B A (July 2018, Journal of Physics B: Atomic, Molecular and Optical Physics)
4. Incoherence and fibering of many free-by-free groups

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   Kropholler, Robert P; Walsh, Genevieve S (January 2022, Annales de l'Institut Fourier)

   A group is called free-by-free if it is the semi-direct product of two finitely generated free groups. A group is coherent if any finitely generated subgroup is finitely presented, and incoherent otherwise. In this paper, the authors provide evidence towards the conjecture (due independently to the authors and Dani Wise) that every free-by-free group is incoherent. To do this, they give a homological condition which lets them conclude that the free-by-free group has a finite index subgroup which surjects onto ℤ with finitely generated kernel; standard arguments imply that this kernel cannot be finitely presented. As an important special case, they show that if the free-by-free group is hyperbolic and virtually special, then it is incoherent. 

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